Heel-burnishing machine



C. J. AD'DY.v Heel Burnishing Machine. No. 235,115. Patented Dec. 7,1880.

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CHARLES J. ADDY, OF BOSTON, ASSIGNOR TO THEODORE A. DODGE, TRUSTEE, OF CAMBRIDGE, MASSACHUSETTS.

HEEL-BURNISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 235,115, dated December 7, 1880.

Application filed February 17, i879.

To all whom t may concern:

Be it known that I, CHARLES J. ADDY, of Boston, in the county of Suffolk and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Machines for Bnrnishing the Heels of Boots and Shoes, of which the following is a specification.

The invention relates to that class of machines in which the heel of a boot or shoe held upon a firm support is subjected, upon its blackened edge, to the action of a burnishingtool which is forced againstit by the pressure of a spring, and is reciprocated around the edge of the heel repeatedly, and in which the burnishing-tool is of such shape and size as to rub only a portion of the edge of the heel at each movement, so that to bring about the burnishing of the whole edge of the heel from vamp to face the heel is moved along under the reciprocating buruisher at right angles to and across under its path until the whole edge is brought under its action.

In the machine of this classin common use, known as the Tapley 7 machine, the burnishin g-tool is pressed against the heel by a radial spring, which bears directly down at its free end upon the shank of the burnishing-tool, and as a result of this when the tool is forced upward by the advance of the large part of the heel the stress of the spring grows greater, whereby the bnrnishin g-tool is pressed against the heel with undue force.

The object of my invention is to overcome the centrifugal motion of the burnishing arm, and at the same time construct the spring which holds the burnishin g-tool at the end of the burnishing-arm against the heel in such manner that the pressure of the burnishing-tool will be uniform at all parts of the heel notwithstanding the degree of its curvature or the difference in size between the toplift and heel-seat. To do this I have connected with or fixed to the pivoted burnishing-arm a counter-balance or block located at one side of the oscillating shaft which moves it, the main part of which is extended across or located at the opposite side ofthe said shaft which imparts to the burnishing-arm its oscillating motions, and I have applied upon this counter-balance or block a roller to co-Operate with a spring fixed with relation to the said shaft, the face of the spring being so curved that as the position of the counter-balance and its roller is changed by reason of change of position ofthe burnishing-arm and its tool, owing to inclina-- tion or curvature of the heel, the said roller will be made to act upon the said spring at a greater or less distance from its end, thus equalizing under all positions of the arm the pressure of the tool upon the heel being burnished.

In this my invention the pressure of lthe tool upon the small part of the heel near the top-lift is just the same as upon the large part of the heel near the heel-seat.

Figure I represents, in perspective, a heelburnishing machine embodying myinvention, part of a shoe and its attached heel being jacked in position to be burnished, and Fig. 2 is a longitudinal section taken through the burnishing-arm and parts above the column of the machine.

The column A of the machine has at its upper end a yoke, B, to receive the shaft C, which will be oscillated for the proper `distance in each direction in any usual way, preferably as in the well-known Tapley burnishing-machine. This shaft C has fixed upon it a collar, D, to which is pivoted the rear end of the burnishing-arm E, it being provided at its outer end with a burnishing-tool, It, of any usual or suitable construction.

As the shaft C s oscillated rapidly in opposite directions, the burnishing-arm E, if left free, would obey the laws of centrifugal action and be thrown outward away from the surface of the heel, thereby destroying its effective operation. To overcome this centrifugal tendency of the burnishing arm, I have fixed to it at a point beyond its pivot, toward the tool It, the counter-balance or block H, and have so coustructed this counter-balance or block that the main portion of its weight (being more or less, according to the weight ofthe burnishing-arm) is thrown to the opposite side of and below the shaft C.

In order to provide for an equal pressure of the burnishing-tool R upon the heel being burnished from its lower to its upper end, I have adjustably connected with the lower end of IOO the collar D a leaf-spring, G, it being curved rearwardly, downwardly, and upwardly, substantially as shown in the drawings, and the free end of the spring is placed upon the roller I, carried by the counter-balance or block H.

As the burnishing-tool and its carrying-arm are moved toward and from the center ot' the axis ot' the heel, owing to variations in size or curvature ofthe heel, the counter-balance H is also moved with it, causing the roller I to move toward or from the rear end of the spring G, following along its curved face, thus keepy ing the force ot' the spring or the amount ot' its pressure upon the counter-balance and burnishing-arin constant and uniform.

The screw L, which connects the counter-balance or block H with the burnishing-arm, may be adjusted with relation to the shaft C, to gage the extent of movement ot' the burnishing arm and tool toward the said shaft.

The advance of the large parts of the heel under the burnishing-tool forces it and the burnishing-arm upward against the stress of` the spring G, resting on the roller I; but during such movements the roller I is carried toward the free end of the spring G, so that the greater the movement ot the burnishing tool and arm upward the nearer the roller I is brought to the free end otl the curved spring, whereby the pressure of the burnishing tool on the large parts ot' the heel is equalized, thus enabling the pressure of the tool upon the large part ot' the heel to be the same, or substantiallyT the saine., as the pressure exerted upon the small parts ot' the heel-or, in other words, the tendency to increase the stress ot' the spring G by bending it upward as the arm E is moved from shaft C is neutralized, or nearly so, by shifting the position ot' the roller I farther toward the free end of the said curved spring.

I am aware thatit is not new to use a curved spring the stress of which is made constant, orsubstantially so, notwithstan ding Variations in the position of the burnishing tool and its carrying-arm; and I am also aware that it is not new to provide a bnrnishing-machine with a pivoted counter-balance or block carried by the shaft which moves the arm, to counteract the centrifugal action of the burnishing arm and tool. I do not broadly claim a counterbalance for a burnishing-arm.

By connecting the spring G with the collar instead ot' with the burnishing-arm I am enabled to reduce the weight carried by the arm, and thus reduce its tendency to tly from the center.

I claim- In an organized burnishing-machine, the oscillating shaft, its collar, and connected curved spring, combined with the bnrnishing -arm pivoted on the said collar above the oscillating shaft, the bnrnishing -tool carried by the said arm, and the counter-balance or block provided with roller to receive the curved spring, the counter-balance or block being' secured directly to the said burnishing-arin, and having its part to counterbalance the weight ofthe arm and tool located below the said oscillating shaft, all substantially as described.

CHARLES J. ADDY.

Witnesses:

It. R. GILMAN, FREDERICK P. FISH. 

